Download Lab Reflection Questions – Estimating the Time Needed for Mitosis

Lab: Estimating the Time Needed for Mitosis
BSC 1007 Introduction to Biology
Lab Reflection Questions – Estimating the Time Needed for Mitosis
1. In which phase of plant cell mitosis is the most time spent? In
which phase of animal cell mitosis?
2. In which phase of plant cell mitosis is the least time spent? In
which phase of animal cell mitosis?
3. What is the total percentage of time the plant and animal cells
spend undergoing mitosis?
4. What percentage of the time are the plant and animal cells not
undergoing mitosis?
Lab: Estimating the Time Needed for Mitosis
BSC 1007 Introduction to Biology
5. What are the plant and animal cells doing when they are not
undergoing mitosis?
6. What important changes are occurring in the nucleus during the
longest phase of mitosis? Does this justify the amount of time
spent in the phase?
7. Where might you look for cells in the human body that are
undergoing mitosis?
8. What would happen if the process of mitosis skipped
metaphase? telophase?
Lab: Estimating the Time Needed for Mitosis
BSC 1007 Introduction to Biology
9. The following table shows average times required for normal
and diseased chicken stomach cells to complete the cell cycle.
Based on the data presented here:
TIME FOR CELL CYCLE OF NORMAL AND CANCEROUS
CHICKEN STOMACH CELLS (IN MINUTES)
NORMAL CHICKEN
CANCEROUS CHICKEN
STOMACH
STOMACH CELLS IN
CELLS IN MINUTES
MINUTES
Interphase
540
380
Prophase
60
45
Metaphase
10
10
Anaphase
3
3
Telophase
12
10
How do cancer cells differ from normal cells in the total time
required for mitosis?
How do cancer cells differ from normal cells in time spent for
each phase?
Lab: Estimating the Time Needed for Mitosis
10.
BSC 1007 Introduction to Biology
Based on the data presented here:
TIMES NEEDED FOR MITOSIS
PROPHASE
METAPHASE
ANAPHASE
TELOPHASE
TOTAL
Salamander
kidney cells
60
50
6
70
186
Pea root cells
80
40
4
12
136
Which organism, salamander or pea, shows time needed to
complete mitosis most like the data you recorded for the onion
root tip?
Why might the time required for these two organisms to
complete mitosis be similar?